EP 0261820 B1 19900808 - FILLER COMPOSITIONS AND THEIR USE IN MANUFACTURING FIBROUS SHEET MATERIALS
Title (en)
FILLER COMPOSITIONS AND THEIR USE IN MANUFACTURING FIBROUS SHEET MATERIALS
Publication
Application
Priority
GB 8621680 A 19860909
Abstract (en)
[origin: EP0261820A1] A filler composition that is suitable for use in the manufacture of paper, board, wet-laid non-wovens or other fibrous sheet materials comprises (preferably flocculated) filler particles (e.g. mineral fillers such as clay, talc or calcium carbonate) attached to fibres (e.g. synthetic organic fibres such as polyester or aramid fibres) by means of a coupling agent. These fibres generally have an average fibre length of 4 mm or more. Suitable coupling agents include oligomeric and other polymeric materials such as modified starch, cellulose ethers and derivatives thereof, modified natural gums, ketene dimers or poly(vinyl alcohol). Colloidal silica or colloidal bentonite clay may also be included. The filler composition is preferably added to the stock before the latter reaches the flowbox of the sheet-making machine. The invention allows high levels of filler to be achieved whilst maintaining satisfactory strength properties, in particular tear strength, in the sheet.
IPC 1-7
IPC 8 full level
D21H 21/50 (2006.01); D21H 11/00 (2006.01); D21H 13/24 (2006.01); D21H 17/00 (2006.01); D21H 17/67 (2006.01); D21H 17/69 (2006.01)
CPC (source: EP US)
D21H 17/00 (2013.01 - EP US); D21H 17/69 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0261820 A1 19880330; EP 0261820 B1 19900808; AU 601215 B2 19900906; AU 7859887 A 19880407; BR 8707456 A 19881101; CA 1285713 C 19910709; CN 1014333 B 19911016; CN 87106213 A 19880323; DE 3764227 D1 19900913; ES 2017499 B3 19910216; FI 882124 A0 19880506; FI 882124 A 19880506; GB 8621680 D0 19861015; IN 168553 B 19910427; JP H01501639 A 19890608; US 5017268 A 19910521; WO 8802048 A1 19880324
DOCDB simple family (application)
EP 87307721 A 19870902; AU 7859887 A 19870902; BR 8707456 A 19870902; CA 545888 A 19870901; CN 87106213 A 19870909; DE 3764227 T 19870902; ES 87307721 T 19870902; FI 882124 A 19880506; GB 8621680 A 19860909; GB 8700613 W 19870902; IN 687CA1987 A 19870831; JP 50517187 A 19870902; US 19287988 A 19880627